A planning lawyer would be able to provide such an opinion. They're not cheap, and they may view it differently, which is why I suggest it only if you think the work is likely to meet with resistance from the LPA.
I think you've answered my query, everyone seems to be unsure as to what we need so my best and cheapest option would be to pay the £90 for the 192 on a decision on wether we need planning or not. As £90 is a reduced cost of a £500 planning lawyer. Or my other option just go for planning permission anyway and save the £90
